SQL syntax error: Function call cannot be applied to this expression

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• Why does this Sql query shows the possible changes but does not implement it?

  So, I want to change the prefix of my tables and the following command shows the possible changes that will take place which seems alright but does not seem to implement it.

  SELECT Concat('RENAME TABLE ', TABLE_NAME, ' TO fan_', SUBSTRING_INDEX(TABLE_NAME, 'pc_',-1), ';') FROM information_schema.tables WHERE table_name like 'pc_%' and table_schema='testdbhere'

  Moreover, this isn't a writing privilege issue as changing the tables name individually works perfectly from the same user.
• how to get weeklytotal and yesterday record in mysql in one table

  Hi Everyone i am trying to implement query to get weekly and yesterday data in same table, dummy output i have shared below, if yesterday not exist as per employee_id it should we showing 0 also as per my table week start from monday and end at sunday.please help me out how to query this get weekly_total and yesterday record and one table.

  Table name-dailydata-

  Sample data

  employee_id	date	total
  20	2022-04-25	10
  20	2022-04-26	20
  20	2022-04-27	20
  20	2022-04-28	10
  20	2022-04-29	20
  20	2022-04-30	30
  20	2022-04-31	40
  20	2022-05-01	50
  40	2022-04-26	20

  expected output

  employee_id	weekly_total	yesterday_record
  20	200	40
  40	20	0

  mysql query to get weekly data

  select employee_id,sum(total) as week_total from dailydata where date between '2022-04-25' and '2022-05-01'
  
• Procedure to display the Employees of a specific Department

  Create a stored procedure, to display the lastnames as "Name" from the employee table. The requirement is as below: The name of the Procedure : EmployeesDept

  Name of the argument as Input : DeptNo

  Write the code to create the procedure

  Schema

  I wrote the Query like this but i didnt get expected output

  CREATE  PROCEDURE Employeesdept(@Deptno varchar)
  AS
  Begin
  SELECT lastname as name
  from employee
  where workdept= 'D21'
  end
  

  Expected output:

  Name --------------- Pulaski Jefferson Marino Smith Johnson Perez Monteverde Name ---------------
• delete a table form a database using laravel command

  i need to delete a database table using laravel artisan command . not like this command php artisan migrate:rollback --step=5

  i need to create like this route or controller code .

  Route::get('/clear/database', function () {

      Artisan::call('cache:clear');
      return redirect('/');
  

  });

  . i also try public function dd()

  {
      Schema::drop('table_name');
  }
  

  but it not working . gives me error like this SQLSTATE[23000]: Integrity constraint violation: 1451 Cannot delete or update a parent row: a foreign key constraint fails (SQL: drop table table_name)

  no foreign key for the table . what should i do ?

  thanks in advance!
• How to bring data frame into single column from multiple columns in python

  I have data format in these multiple columns. So I want to bring all 4 columns of data into a single column.

  YEAR Month pcp1 pcp2 pcp3 pcp4              
  1984    1   0   0   0   0
  1984    2   1.2 0   0   0
  1984    3   0   0   0   0
  1984    4   0   0   0   0
  1984    5   0   0   0   0
  1984    6   0   0   0   1.6
  1984    7   3   3   9.2 3.2
  1984    8   6.2 27.1    5.4 0
  1984    9   0   0   0   0
  1984    10  0   0   0   0
  1984    11  0   0   0   0
  1984    12  0   0   0   0
  
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  When I use Kingbase database in Windows environment, I find that the time function returns the same value in the same transaction. How do I deal with it